U.S. patent application number 12/331809 was filed with the patent office on 2010-06-10 for multi-purpose electrician's measuring tape.
Invention is credited to ANTONIO GERMAIN.
Application Number | 20100139110 12/331809 |
Document ID | / |
Family ID | 42229463 |
Filed Date | 2010-06-10 |
United States Patent
Application |
20100139110 |
Kind Code |
A1 |
GERMAIN; ANTONIO |
June 10, 2010 |
MULTI-PURPOSE ELECTRICIAN'S MEASURING TAPE
Abstract
An electrician's reference device, wherein accurate phase
determinations may be simply identified therefrom, and wherein
conduit bending measurement calculations may be confidently
established, via a quick, consistent, easy and convenient method
incorporated into a commonly used tool configuration.
Inventors: |
GERMAIN; ANTONIO;
(Castleberry, FL) |
Correspondence
Address: |
Innovative IP, LLC
P.O. Box 217
New Smyrna Beach
FL
32170
US
|
Family ID: |
42229463 |
Appl. No.: |
12/331809 |
Filed: |
December 10, 2008 |
Current U.S.
Class: |
33/755 |
Current CPC
Class: |
G01B 3/1084 20130101;
G01B 3/1003 20200101; H02G 3/00 20130101 |
Class at
Publication: |
33/755 |
International
Class: |
G01B 3/10 20060101
G01B003/10 |
Claims
1. A multi-purpose electrician's measuring tape device, comprising:
a case; and a measuring tape retractably carried within said case,
said measuring tape having a first side and a second side, said
first side of said measuring tape adapted with a three-phase
electrical wiring determination reference guide.
2. The multi-purpose electrician's measuring tape device of claim
1, wherein said second side of the measuring tape is adapted with
conduit bending reference data.
3. The multi-purpose electrician's measuring tape device of claim
1, wherein said electrical wiring phase determination reference
guide further comprises circuit phase and wire color reference
data.
4. The multi-purpose electrician's measuring tape device of claim
2, wherein said conduit bending reference data further comprises
offset angle shrinkage data.
5. The multi-purpose electrician's measuring tape device of claim
1, wherein said measuring tape is self-retracting.
6. The multi-purpose electrician's measuring tape device of claim
1, wherein said measuring tape is 30 feet long, one-inch wide, and
double-coated with nylon.
7. The multi-purpose electrician's measuring tape device of claim
1, wherein said measuring tape has a magnetic tip and a double end
hook.
8. The multi-purpose electrician's measuring tape device of claim
1, wherein said case is rubberized.
9. The multi-purpose electrician's measuring tape device of claim
1, wherein said three-phase electrical wiring reference guide
further comprises a plurality of measurement reference numbers with
color coding to correlate to wire color phase and voltage, wherein
each said measurement reference number of said plurality directly
correlates to a respective circuit number within a panel.
10. The multi-purpose electrician's measuring tape device of claim
2, wherein said conduit bending reference data is adapted for use
with electrical metal tubing (EMT), rigid metal conduit (RMC), and
intermediate metal conduit (IMT), wherein said conduit bending
reference data further comprises a first offset table displaying a
plurality of offset angles, a related plurality of multipliers, and
a related plurality of shrinkage per inch of offset depth factors,
and wherein said conduit bending reference data further comprises a
second offset angle table displaying a plurality of offset depths,
a related plurality of measurement distances between marks, and a
related plurality of shrinkage amounts.
11. A multi-purpose electrician's device, comprising: a case; a
tape with measured length markings indicated thereon, said tape
retractably carried within said case, wherein said measured length
markings further comprise numerical measurement indicators, and
wherein said numerical measurement indicators are colorized
according to a pattern, said pattern further comprising
dual-coloration for each said numerical measurement indicator, said
dual-coloration further comprising a first color printed in the
upper region of each said numerical measurement indicator and a
second color printed in the lower region of each said numerical
measurement indicator, wherein each said first color is one of a
plurality of high voltage wire colors, wherein each said second
color is one of a plurality of low voltage wire colors, wherein
said pattern further comprises a correspondence for each said
numerical measurement indicator with a numerical circuit reference,
wherein said numerical circuit reference defines one phase of a
three phase electrical wiring system, and wherein said phase
defines said first color and said second color.
12. The device of claim 11, wherein said phase is selected from
said three phases of A, B, and C, and said first color is selected
from said plurality of high voltage wire colors further comprising
brown, orange and yellow wire colors, respectively, for each said
phase.
13. The device of claim 11, wherein said phase is selected from
said three phases of A, B, and C, and said second color is selected
from said plurality of low voltage wire colors further comprising
black, red, and blue wire colors, respectively, for each said
phase.
14. The device of claim 11, further comprising one or more
additional features selected from the group consisting of
laser-assisted measurement features and leveling components.
15. The device of claim 11, wherein said measured length markings
further comprise said dual-coloration corresponding to said
numerical measurement indicators proximate thereto.
16. A method of electrical wiring, comprising the steps of:
identifying a circuit with a number in a panel for installation;
identifying an electrical element to be installed to said circuit;
obtaining an electrician's measuring tape comprising a three-phase
electrical wiring determination reference guide; viewing a color
coded measurement numeral on said guide that corresponds to said
number of said circuit; and installing a wire with the same color
as said color coded measurement numeral.
17. The method of claim 16, wherein said electrician's measuring
tape further comprises a conduit bending reference, and further
comprising the steps of: identifying a span and offset angle for a
conduit; viewing said conduit bending reference for said offset
angle; selecting a length of conduit according to said reference;
marking said conduit according to said reference; and bending said
conduit according to said offset angle at said marks.
18. The method of claim 16, wherein said offset angle is selected
from a group consisting of angles
221/2.degree..times.221/2.degree., 30.degree..times.30.degree.,
45.degree..times.45.degree., and 60.degree..times.60.degree..
Description
FIELD
[0001] The present disclosure relates generally to tools, and more
particularly, to a multi-purpose electrician's measure tape and
method thereof, wherein an easily accessible reference system
facilitates accurate and efficient installation of wiring.
BACKGROUND
[0002] Although an electrician is one of many contractors that
contributes the final realization of a habitable building or
structure, the electrical wiring is a critical component. Building
wiring provides power, thereby enhancing the usefulness of the
building; however, failure to properly install such wiring can
render dangerous and even deadly results. To that end, a National
Electrical Code (NEC) has been formulated by the National Fire
Protection Association (NFPA) in order that buildings and
structures are safely wired, with least risk to inhabitants. Once
the NEC is adopted as law in a given geographic region, each
permitted job is inspected for compliance. In such an inspection,
installation aspects are reviewed for conformity in view of the NEC
code and the plans.
[0003] In a typical installation site, an electrician is provided
with a set of plans, or blueprints, wherein receptacles and devices
are noted. Smaller circuits are generally utilized for general
purpose receptacles and lighting, and higher ratings are generally
dedicated to one major appliance, such as an air conditioner or
water heater. Each such power destination is designated as high or
low voltage, and depending upon that designation, and the
appropriate phase, a proper wire selection must be made by the
electrician for installation between the circuit panel and the
destination receptacle or device, for example.
[0004] Electricians must necessarily view the two-dimensional plans
and correspondingly create the correct three dimensional
installation. For example, conventional symbols and notations are
used to represent intended electrical appliances and equipment. The
voltage and circuit is typically defined on the plans, but it is
left for the electrician to determine the proper phase. Color
coding of wire is a critical feature. For example, phase wire
generally may be black, red, orange, brown, yellow, and blue.
Neutral wire is gray or white, and grounding wire is green or green
striped. Each phase is associated with particular wire colors,
wherein improper installation can result in not only a failed
inspection, but a dangerous structure at risk for electrical
fire.
[0005] In a typical three-phase system, for example, phase
determination for a particular circuit is usually accomplished by
dividing the circuit number by the number six. The remainder
identifies the phase, by convention, which accordingly dictates the
color wire to be utilized for that circuit at the identified
voltage, wherein the normal phasing of a three phase system is A,
B, C, left to right, top to bottom. A typical electrician,
therefore, must either memorize the phases A, B or C for each of
the 99 or so circuits per panel (typically, approximately 80), or
the phase must be calculated, on the spot, during installation.
Either way, human error disadvantageously introduces error at an
identifiable frequency.
[0006] Another installation task routinely faced by an electrician
is conduit bending. Conduit is a protective, insulative tube
through which electrical wires are fed. As an electrician
progresses through a job, he must not only identify the correct
circuit and voltage from the plans, and calculate the appropriate
phase, but he must also calculate the necessary conduit lengths
required to enable extension across a particular length, and with
the necessary angular bends to traverse a given path. That is, in
order to determine the appropriate length of conduit to cut, an
electrician must be able to compensate for the shrinkage that will
occur from each angular bend.
[0007] For example, the most commonly specified bend is a
30.degree..times.30.degree. bend. Most electricians therefore
readily recite that such a bend results in shrinkage of 1/4 per
inch of offset depth, and therefore know that a multiplier of 2.0
is necessary to compensate therefore. However, there are a
plurality of offset angles, or bends, generally four types in Code,
that may be specified and/or required by a given plan or
installation, wherein these less frequently utilized bends can be
disadvantageously miscalculated, resulting in materials waste and
installation time loss and delay.
[0008] Therefore, it is readily apparent that there is a need for
an electrician's reference device, wherein accurate phase
determinations may be simply identified therefrom, and wherein
conduit bending measurement calculations may be confidently
established, via a quick, consistent, easy and convenient method
incorporated into a commonly used tool configuration, thereby
avoiding the above-discussed disadvantages.
BRIEF SUMMARY
[0009] Briefly described, in a preferred embodiment, the present
device overcomes the above-mentioned disadvantages and meets the
recognized need for such a device by providing a multi-purpose
electrician's measuring tape device, wherein a first side of a
retractable tape is adapted with a phase determination reference
guide, and wherein a second side of the retractable tape is adapted
with conduit bending reference data.
[0010] According to its major aspects and broadly stated, in its
preferred form, the present device is a multi-purpose electrician's
measuring tape that enables a user to quickly, easily, and
confidently determine the appropriate phase color installation of
wiring to a given device to be installed to a given circuit, and
that further enables a user to quickly, easily, and confidently
determine the appropriate length of a particular diameter conduit
necessary to accomplish an identified traverse with particular
bends therewithin, each essentially without risk of improper
installation, code violation, and/or materials waste.
[0011] More specifically, the device of the present disclosure in
its preferred form is a multi-purpose electrician's measuring tape
device comprising a self-retractable measuring tape, preferably a
30 foot long, one-inch wide tape, preferably double-coated with
nylon for durability, preferably with a magnetic tip and double end
hook for ease of use, and also preferably with a rubberized case
for ease of grip. The tape is first, therefore, adapted for use as
a conventional measuring tape.
[0012] Additionally, the first side of the tape is adapted with a
three phase wiring reference system, for a second use. That is,
each numerical measurement reference number from one to ninety-nine
is color coded to allow for quick recognition of wire color and
phase, wherein each numerical measurement reference number directly
correlates to the respective circuit number, and wherein the color
of the number corresponds to the wire color, phase, and
voltage.
[0013] Further, the second side of the tape is adapted with a
conduit bending reference system, for still another use with
electrical metal tubing (EMT), rigid metal conduit (RMC), and
intermediate metal conduit (IMT). That is, an offset table with
provision of offset angle, multiplier, and shrinkage per inch of
offset depth is preferably provided, and an offset angle table with
provision of offset depth, distance between marks, and shrinkage
per amount is also preferably provided. The offset angles, distance
between marks, and shrinkage amounts may therefore be consistently
known.
[0014] A feature and advantage of the present device is therefore
the ability of such a device to facilitate proper and code
compliant installation of electrical wiring.
[0015] Another feature and advantage of the present device is the
ability of such a device to facilitate quick, consistent conduit
bending.
[0016] Another feature and advantage of the present device is the
ability of such a device and method to enable easy reference with
necessitating carriage of any additional item or tool, thereby
enabling efficiency of transport.
[0017] Still another feature and advantage of the present device is
its ability to perform multiple functions, including provision and
delivery of accurate direct length measurements, phase
determination identifications, and conduit manipulation reference
data.
[0018] Yet another feature and advantage of the present device is
the ability of such a device to assist in the avoidance of improper
wiring, inspection failure, and/or risk of electrical damage.
[0019] Still yet another feature and advantage of the present
device is its ability to retain functionality in any environmental
condition at any location.
[0020] Still another feature and advantage of the present device is
its ability to essentially eliminate the need for the electrician
to memorize or otherwise perform on-site calculations for proper
phase determination.
[0021] Another feature and advantage of the present device is its
ability to essentially eliminate the need for the electrician to
memorize or otherwise perform on-site calculations for proper
conduit bending.
[0022] Yet still another feature and advantage of the present
device is its ability to perform via traditional retractable
measurement tape technique.
[0023] These and other features and advantages of the device will
become more apparent to one skilled in the art from the following
description and claims when read in light of the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The present invention will be better understood by reading
the Detailed Description of the Preferred and Alternate Embodiments
with reference to the accompanying drawing figures, in which like
reference numerals denote similar structure and refer to like
elements throughout, and in which:
[0025] FIG. 1 is a multi-purpose electrician's measuring tape
device, according to the preferred embodiment, showing a
representative segment of a first side of the tape;
[0026] FIG. 2A is the multi-purpose electrician's measuring tape
device of FIG. 1, showing a first representative segment of a
second side of the tape;
[0027] FIG. 2B is the multi-purpose electrician's measuring tape
device of FIG. 1, showing a second representative segment of the
second side of the tape;
[0028] FIG. 3 is the multi-purpose electrician's measuring tape
device of FIG. 1, showing a case;
[0029] FIG. 4 is a partial, front representational view of an
exemplary circuit panel, showing a representative phase
arrangement;
[0030] FIG. 5 is a perspective view of an exemplary length of
installed conduit, showing representative bends; and
[0031] FIG. 6 is a multi-purpose electrician's measuring tape
device, according to an alternate embodiment, showing a segment of
a first side of the tape.
DETAILED DESCRIPTION OF THE PREFERRED AND ALTERNATE EMBODIMENTS
[0032] In describing the preferred and alternate embodiments of the
present invention, as illustrated in the figures and/or described
herein, specific terminology is employed for the sake of clarity.
The invention, however, is not intended to be limited to the
specific terminology so selected, and it is to be understood that
each specific element includes all technical equivalents that
operate in a similar manner to accomplish similar functions.
[0033] Referring now to FIGS. 1-3, the present invention in the
preferred embodiment is multi-purpose electrician's measuring tape
device 10, and method thereof, generally comprising tape 20 and
case 30, wherein markings 22 visibly displayed on tape 20
facilitate the multiplicity of use for tape device 10. That is,
first side 40 of tape 20 is preferably adapted with phase
determination reference guide 42, and second side 60 of tape 20 is
preferably adapted with conduit bending reference data 62.
[0034] According to the preferred embodiment, tape 20 of device 10
is self-retractable, according to known and readily available
mechanisms available in the art, and is preferably a 30 foot long,
one-inch wide tape, preferably double-coated with nylon for
durability, preferably with magnetic tip 80 and double end hook 82
for ease of use, and also wherein case 30 is rubberized for ease of
grip and rugged durability. It should be noted, however, that any
or all of the foregoing traditional tape features may be excluded
without departing from the intended scope of the present
disclosure. That is, device 10 could be alternately
non-self-retractable and/or could be of a length greater or less
than 30 feet. Moreover, the width of tape 20 could be greater or
less than one inch, and tape 20 could be manufactured from any
suitable material, whether or not coated with nylon. Still further,
tape 20 could be fashioned without magnetic tip 80 and/or double
end hook 82, as desired. Additional features, too, could be added
without departing from the spirit and scope of the disclosure, such
as laser-assisted measurement features, leveling components, and/or
any other accessory feature useful during typical measurement
projects.
[0035] It is therefore the format of tape 20, or more specifically,
markings 22 displayed thereon that improves the functionality of
device 10. Markings 22 preferably comprise phase determination
reference guide 42 on first side 40 of tape 20 and conduit bending
reference data 62 on second side 60 of tape 20.
[0036] Phase determination reference guide 42 is preferably
configured for use as a three phase wiring reference system. With
particular reference to FIG. 1, a representative portion of guide
42 is shown, wherein each numerical measurement reference character
44 (inches, as shown) is preferably colorized, preferably including
numbers ranging from one to ninety-nine. Although greater or fewer
numbers could be systematically colorized without departing from
the intended scope of the present disclosure, it is recognized that
most circuit panels P, such as representatively depicted in FIG. 4,
are provided with an average number of eighty circuits, such that
coloration of numerical measurement reference characters 44 up to
one hundred is more than adequate for most applications. That is,
the preferred color-coding scheme facilitates quick recognition of
wire color and phase, wherein each numerical measurement reference
character 44 directly correlates to the respective circuit number
C, and wherein the coloration of each numerical measurement
reference character 44 corresponds to the wire color, phase, and
voltage.
[0037] Preferably, each numerical measurement reference character
44 is displayed in two colors, high voltage color 46 and low
voltage color 48. It is preferred that high voltage color 46 is the
upper, or high, color for each particular character 44, and that
low voltage color 48 is the bottom, or low, color. In such an
arrangement, recollection regarding which color code relates to
high voltage is confirmed by "high" placement of high voltage color
46. Thus, as noted, the preferred color-coding scheme facilitates
quick recognition of wire color and phase, wherein each numerical
measurement reference character 44 directly correlates to
respective circuit number C, and wherein high voltage color 46 and
low voltage color 48 correspond to the wire color, phase, and
voltage. Accordingly, the preferred color scheme denotes plurality
of high voltage colors 46 to comprise brown, orange, and yellow
wires, respectively A, B, and C phases, and further denotes
plurality of low voltage colors 48 to comprise black, red, and blue
wires, respectively A, B, and C phases.
[0038] Referring again to representative segment of tape 20 in FIG.
1, the numerical measurement reference characters 44 at the one
inch and two inch marks, for example, comprise upper or high
voltage color 46 of brown and bottom or low voltage color 48 of
black. Accordingly, for a high voltage installation at circuit one
or circuit two, a brown wire would be properly utilized, and for a
low voltage installation, a black wire would be properly utilized.
Additionally, "A" phase is visually reconfirmed by its
correspondingly colorized placement of phase indicator 45 between
the two numerical measurement reference characters. By way of
further example, for installation to circuit three or circuit four,
for a high voltage electrical component, orange wire would be
properly utilized and for a low voltage installation, red wire
would be correct, with "B" phase reconfirmed by phase indicator
45b. And again, as a further example, for installation of wiring to
circuit five or six, for a high voltage installation, yellow wire
would be appropriate, and for a low voltage component, blue wire
would be properly utilized, confirming "C" phase with phase
indicator 45c. This preferred coloration pattern thus continues in
such a manner that an electrician may simply pull out tape 20, view
the numerical measurement reference character 44 displayed thereon
that corresponds to the relevant circuit number to which the
component wiring is to be installed, and immediate visual
confirmation of color and phase is provided, without any need for
calculation.
[0039] As an even further useful improvement, markings 22 of device
10 preferably further comprise conduit bending reference data 62 on
second side 60 of tape 20, wherein conduit bending reference data
62 is adapted for use with electrical metal tubing (EMT), rigid
metal conduit (RMC), and intermediate metal conduit (IMC).
Referring now to FIGS. 2A and 2B, preferably, a plurality of offset
angles 100 is referenced, comprising Code angles
221/2.degree..times.221/2.degree., 30.degree..times.30.degree.,
45.degree..times.45.degree., and 60.degree..times.60.degree.
wherein necessary measurement data is provided for accurate marking
and formation of essentially any bend, B, such as depicted in
representative FIG. 5.
[0040] According to the preferred embodiment, for each of plurality
of offset angles 100, table 102 (representatively shown in FIG. 2A)
conveniently displays expected shrinkage per inch of offset depth
104 and multiplier 106. In such manner, an electrician may quickly
confirm the necessary measurement compensations that must be
factored in view of the shrinkage impact, again without requiring
estimation or memorization; thus avoiding miss-cuts and materials
waste, even for novice electricians. Additionally, and further
according to the preferred embodiment, for each plurality of offset
angles 100, table 108 (representatively shown in FIG. 2B)
conveniently displays correlating offset depths 110, shrinkage
amounts 114, and distance between marks 112, in order that bends
may be accurately placed along the length of the conduit CD in view
of the necessary offset depth. Again, estimation and memorization
of relationships between the factors is eliminated, wherein even a
novice electrician may accurately read and efficiently perform a
selected and/or directed conduit bending and installation task.
[0041] In an alternate embodiment, as depicted in FIG. 6, markings
22 on tape 20 could be alternately configured, wherein phase
indicators 45a, 45b, and 45c may be displayed prior to the
numerical measurement reference characters 44 for the circuit C
corresponding to the phase. Even further alternate positional
configurations could be utilized for phase indicators 45a, 45b, and
45c, as desired, without departing from the intended scope of the
present disclosure. Moreover, measurement delineations 121a, 121b
defined proximate the side edges of tape 20 could be displayed with
coloration corresponding to the phase coloration scheme, as
desired, wherein, for example, although not depicted, with
reference to FIG. 1, each of the measurement delineations 121a,
121b from leading edge 120 of tape 20 to the two-inch reference
character 44, could be correspondingly colorized, such that upper
measurement delineations 121a could be brown and lower measurement
delineations 121b could be black.
[0042] Having thus described exemplary embodiments of the present
invention, it should be noted by those skilled in the art that the
within disclosures are exemplary only, and that various other
alternatives, adaptations, and modifications may be made within the
scope of the present invention. Accordingly, the present invention
is not limited to the specific embodiments illustrated herein, but
is limited only by the following claims.
* * * * *